The protective effects of rutaecarpine on gastric mucosa injury in rats

Li Wang, Chang Ping Hu, Pan Yue Deng, Shen Si Shen, Hui Qing Zhu, Jin Song Ding, Gui Shan Tan, Yuan Jian Li

Research output: Contribution to journalArticlepeer-review

49 Scopus citations

Abstract

Previous investigations have shown that calcitonin gene-related peptide (CGRP) protects gastric mucosa against injury induced by acetylsalicylic acid (ASA) and that rutaecarpine activates vanilloid receptors to evoke CGRP release. In the present study, we examined the protective effects of rutaecarpine on gastric mucosa injury, and explored whether the protective effects of rutaecarpine are related to stimulation of endogenous CGRP release via activating vanilloid receptors in rats. In an ASA-induced ulceration model, gastric mucosal ulcer index, pH value of gastric juice and plasma concentrations of CGRP were determined. ASA significantly increased the gastric mucosal ulcer index and the back-diffusion of H+ through the mucosa. Rutaecarpine at the doses of 100 or 300 μg/kg (i.v.), and 300 or 600 μg/kg (intragastric, i.g.) reduced the ulcer index and back-diffusion of H +, which was abolished by pretreatment with capsaicin (50 mg/kg, s.c.) or capsazepine (3 mg/kg, i.v.), a competitive vanilloid receptor antagonist. Rutaecarpine significantly increased the plasma concentration of CGRP, which was also abolished by capsazepine. In a stress-induced ulceration model, rutaecarpine reduced gastric mucosal damages, which was abolished by capsazepine (5 mg/ kg, i.p.). These results suggest that rutaecarpine protects the gastric mucosa against injury induced by ASA and stress, and that the gastroprotective effect of rutaecarpine is related to a stimulation of endogenous CGRP release via activation of the vanilloid receptor.

Original languageEnglish
Pages (from-to)416-419
Number of pages4
JournalPlanta Medica
Volume71
Issue number5
DOIs
StatePublished - May 1 2005

Keywords

  • Calcitonin gene-related peptide
  • Gastric acid
  • Gastric mucosal ulcer index
  • Rutaecarpine
  • Vanilloid receptors

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